中国湖库营养状态现状调查分析

近年来,随着经济的高速发展,我国湖库氮、磷污染负荷增加,富营养化问题有增无减,已经成为我国湖库面临的重大环境问题。以2005年-2007年我国大陆地区各省(自治区、直辖市)183个湖泊、541个水库的调查资料为基础,采用单项指标评价和综合评价方法,分析了我国湖库富营养化状况。结果表明:我国湖库受营养盐污染的形势十分严峻,富营养化成为我国湖库共同面临的主要环境问题;总体而言,水库的富营养状态要优于湖泊,但水库的富营养化污染也不容乐观;总磷超标情况要重于总氮,透明度超标比例相对较小。

Investigation of the Eutrophication Status of the Lakes and Reservoirs in China

With the high economic growth and increasing nitrogen and phosphors load input,the lakes and reservoirs in China are being faced with eutrophication problems in recent years.Base on the water quality data of 183 lakes and 541 lakes in mainland China,the current eutrophication status of the lakes and reservoirs was analyzed by the single item method and comprehensive method.The results show that the eutrophication status is very severe and a common problem around China;totally the eutrophication condition of the reservoirs is better than that of the lakes,but the eutrophication status of the reservoirs is still not optimistic;the phosphors violates the eutrophication standard more severer than the nitrogen,and the standard violation of Secchi depth transparency(SD) is relatively low.